US Patent D661408 Patio stone

Patent D661408 was granted and assigned to Keystone Retaining Wall Systems Llc on June, 2012 by the United States Patent and Trademark Office.

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Patent Number

Patent Inventor Names

Thomas S. Riccobene0

Date of Patent

June 5, 2012

Patent Application Number

294012180

Date Filed

September 8, 2011

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